Ruthenium-catalyzed ring-closing metathesis to form tetrasubstituted olefins
JM Berlin, K Campbell, T Ritter, TW Funk… - Organic …, 2007 - ACS Publications
JM Berlin, K Campbell, T Ritter, TW Funk, A Chlenov, RH Grubbs
Organic Letters, 2007•ACS Publications… Nevertheless, there remain transformations for which molybdenum-based catalysts are
significantly more efficient, such as ring-closing metathesis (RCM) to form tetrasubstituted
olefins. In this communication, we present new ruthenium complexes with increased
efficiency for this transformation. … In the course of our recent work on ruthenium-catalyzed
enantioselective metathesis, a five-membered ring containing a tetrasubstituted olefin was
unexpectedly isolated from the asymmetric ring-closing reaction of triene 7 catalyzed by …
significantly more efficient, such as ring-closing metathesis (RCM) to form tetrasubstituted
olefins. In this communication, we present new ruthenium complexes with increased
efficiency for this transformation. … In the course of our recent work on ruthenium-catalyzed
enantioselective metathesis, a five-membered ring containing a tetrasubstituted olefin was
unexpectedly isolated from the asymmetric ring-closing reaction of triene 7 catalyzed by …
Increased efficiency for ring-closing metathesis to form tetrasubstituted olefins using N-heterocyclic carbene ligated ruthenium catalysts was achieved by reducing the size of the substituents at the ortho positions of the N-bound aryl rings.
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